ABSTRACT
This chapter present that the John Stuart Mill's contributions to informal logic and the study of argumentation are considerable. It shows some of the ways in which Mill's work is an important precursor of the development in the late twentieth century of informal logic. There are important similarities in how Mill and the informal logicians conceive of logic, and Mill developed in greater detail than any of his predecessors two of the methods that are now widely used by informal logicians. The chapter considers some of the ways Mill has contributed to the practice of argumentation. It explores the Affinities with the work of leading argumentation theorists, and examines the Mill's own interest in discussions as a means of persuasion. Then the chapter also shows the Logic and the Liberty are revealed to be connected by a common strand of concern for truth and the avoidance of error.
